The latest KAS can crash the game if it's installed over the old KSP. Please, verify that you game is up to date (version 1.3+). If everything is looking fine but the game keeps crashing, please, share the KSP.log file for the troubleshooting.

Do you mean this specific project or a Curse project in general? In the latter case just register an account, go to https://kerbal.curseforge.com/ksp-mods, and click "Start project". You may need to have a premium account, though. I never tried to start a project on a regular account.

i get a error on first start - this mod is not compatible with ksp 1.2.2. and, so on, so many other errors! if you like, i can send you screenshots. KAS dont work. i copy the files in Dame Data Ordner, like other files exp. mechjeb or KSP interstellar...